Well, all I can say is welcome to the the wonderful world of RV's. The only "standard" is nothing is standard. I've had 2 identical units that came off the same assembly line at the same time (VIN 1 number different) and found lots of things different.
Even when they are labeled, that doesn't mean it is what it says. I just replaced my AC and the breaker for it is labeled microwave.
About the only true way to figure it out is either turn everything ON and start pulling fuses or pull them all out, turn everything ON and start putting them back in.
Or do what I do, don't worry about it until you pop a fuse and the LED next to it tells you it blew. At that point you can see what else doesn't work that used to work.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.